干旱区生态环境知识资源中心(Arid): Silicon modulates nitro-oxidative homeostasis along with the antioxidant metabolism to promote drought stress tolerance in lentil plants

Arid

DOI	10.1111/ppl.13437
	Silicon modulates nitro-oxidative homeostasis along with the antioxidant metabolism to promote drought stress tolerance in lentil plants
	Biju, Sajitha; Fuentes, Sigfredo; Gupta, Dorin
通讯作者	Biju, S ; Gupta, D (corresponding author), Univ Melbourne, Fac Vet & Agr Sci, Sch Agr & Food, Parkville, Vic 3010, Australia.
来源期刊	PHYSIOLOGIA PLANTARUM
ISSN	0031-9317
EISSN	1399-3054
出版年	2021
卷号	172 期号:2 页码:1382-1398
英文摘要	Lentil is the fifth most important grain legume growing in arid/semi-arid regions of the world. Drought is one of the major constraints leading up to 50% of production losses just in lentil. Application of silicon (Si) has been shown to be a promising solution to improve drought tolerance; however, the biochemical mechanisms and interactions involved are not fully understood, especially in legumes. This study was designed to evaluate the effects of Si on drought stress tolerance of lentil genotypes. Seven lentil genotypes with different drought tolerance levels (tolerant, moderately tolerant and sensitive) were subjected to moderate and severe drought stress at the onset of the reproductive stage. Results showed that different drought stress treatments significantly decreased the above ground biomass, water status and the concentration of chlorophyll pigments, whereas Si supplementation of drought stressed lentil genotypes significantly improved the same traits, irrespective of their drought tolerant levels. On the other hand, Si effect on osmoregulation leads to a decline in the membrane damage and osmolytes (proline and glycine betaine) concentration in drought-stressed lentil. Application of Si to drought-stressed lentil plants significantly maintained the nitro-oxidative homeostasis by balancing the concentrations of reactive oxygen/nitrogen species, superoxide anion, hydrogen peroxide and nitrous oxide, thereby reducing the oxidative damage caused due to drought stress. Furthermore, Si supplementation also stimulated the efficiency of the glutathione (GSH)-ascorbate (ASC) cycle by increasing the concentrations of GSH and ASC as well as the activities of antioxidant enzymes like ascorbate peroxidase, guaiacol peroxidase, catalase, superoxide dismutase, glutathione reductase, dehydro-ascorbate reductase and nitrate reductase for better protection of cell membranes from reactive oxygen species. Although Si showed the same regulatory mechanisms in all the studied genotypes to protect lentil plants from moderate and severe drought stress, the defensive role of Si against drought stress was more conspicuous in drought sensitive genotypes than in the tolerant ones. Thus, this study suggests the protective role of Si on drought-stressed lentil genotypes through the modulation of nitro-oxidative homeostasis and antioxidant defence responses.
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000647866900001
WOS关键词	ABIOTIC STRESS ; WATER-STRESS ; FUNCTIONAL-CHARACTERIZATION ; GLUTATHIONE-REDUCTASE ; ASCORBATE PEROXIDASE ; LIPID-PEROXIDATION ; HYDROGEN-PEROXIDE ; GLYCINE BETAINE ; ENZYME-ACTIVITY ; OSMOTIC-STRESS
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/351317
作者单位	[Biju, Sajitha; Fuentes, Sigfredo; Gupta, Dorin] Univ Melbourne, Fac Vet & Agr Sci, Sch Agr & Food, Parkville, Vic 3010, Australia
推荐引用方式 GB/T 7714	Biju, Sajitha,Fuentes, Sigfredo,Gupta, Dorin. Silicon modulates nitro-oxidative homeostasis along with the antioxidant metabolism to promote drought stress tolerance in lentil plants[J],2021,172(2):1382-1398.
APA	Biju, Sajitha,Fuentes, Sigfredo,&Gupta, Dorin.(2021).Silicon modulates nitro-oxidative homeostasis along with the antioxidant metabolism to promote drought stress tolerance in lentil plants.PHYSIOLOGIA PLANTARUM,172(2),1382-1398.
MLA	Biju, Sajitha,et al."Silicon modulates nitro-oxidative homeostasis along with the antioxidant metabolism to promote drought stress tolerance in lentil plants".PHYSIOLOGIA PLANTARUM 172.2(2021):1382-1398.